Title:
Evaluation of Shear Friction Behavior of Cylindrical Pocket Connections (Prepublished)
Author(s):
Fatima Vieira, Bruno Vasconcelos, and David B. Garber
Publication:
Structural Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
accelerated bridge construction; precast concrete; prefabricated elements and systems; shear friction; substructure connections
DOI:
10.14359/51743289
Date:
10/7/2024
Abstract:
An experimental investigation was conducted to evaluate the shear friction capacity of cylindrical pocket connections without reinforcement crossing the interface, which is a common connection detail between precast concrete substructure elements. Current code expressions for shear friction capacity include components for cohesion or aggregate interlock and as well as contribution from steel crossing the interface or a clamping force. These expressions were primarily derived and calibrated based on push-off tests with reinforcement crossing the shear plane, which do not represent the behavior of the shear plane in a cylindrical pocket connection. Thirty-four (34), large-scale specimens were built and tested to investigate the shear friction of the cylindrical pocket connection without reinforcing steel crossing the shear plane. This experimental study showed that current code expressions provided conservative estimates for this connection. A revised proposed theory is presented that more accurately predicts the shear friction capacity of this connection without interface steel.